#include<iostream>
using namespace std;

//extern FileSystem file;

//extern int all;
//extern class FileSystem;
////extern FileSystem file;
//extern FileSystem& tfs();

#include"article4.h"

class Directory
{
public:
	void fun()
	{
		//file.fun();
	}
};

//int main()
//{
//	Directory d;
//	d.fun();
//	
//	return 0;
//}